我们走了很久英语

是that evening.

that evening做时间状语一般没有in that evening的说法,可说in the evening或on that evening

We walked for a long time

we walked a long time to get there.

这里的 “逛” 是指什么呢？逛街还是？① We shopped for a long time——逛街② We walked for a long time——随便走走③ We strolled for a long time——也是随便走走Saunter 这个词我们不太用。从来都没听别人说，We sauntered.. 要被别人笑话的 哈哈。

We walked a long time that evening.(这个原句最好)= On that day,we walked a long time in the evening.= We walked a long time in the evening that day.